Dual-band dual-polarized antenna array

Inactive Publication Date: 2004-07-29
COMMSCOPE TECH LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Benefits of technology

0001] The present invention refers generally to a new family of antenna arrays that are able to operate simultaneously at two different frequency bands, while featuring dual-polarization at both bands. The design is suitable for applications where the two bands are centered at two frequencies f1 and f2 such that the

Problems solved by technology

Keeping a minimum size for the antenna set-up in a BTS becomes a major issue when taking into account that the growth on the service demands forces operators in increasing the number of BTS, which is starting to produce a significant visual and environmental impact on urban and rural landscapes.
The problem becomes particularly significant when the operator has to provide both 2G and 3G services, because since both kinds of services operate at different frequency bands the deployment of both networks using conventional single-band antennas implies doubling the number of installed antennas and increasing the environmental impact of the installation.
The development of multiband antennas and antenna arrays is one of the main engineering challenges in the antenna field.
Due to this very simple principle, it is very difficult to make an array t

Method used

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  • Dual-band dual-polarized antenna array

Examples

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Example

[0020] An scheme of the basic layout for the spatial arranging (interleaving) of the antenna elements is shown in FIG. 2. The solid dots (1) display the positions of the elements for the lower frequency f1, while the squares (2) display the positions for the antenna elements for the upper frequency f2. Antenna elements for the higher frequency band f2 are aligned along a vertical axis (3) with the desired spacing between elements (11). Said spacing is slightly smaller than a full-wavelength (typically below 98% the size of the shorter wavelength) for a maximum gain, although it can be readily seen that the spacing can be made shorter depending on the application. A second vertical column of elements for the lower frequency band f1 is aligned along a second vertical axis (4) placed next to said first axis (3) and substantially parallel to it. In the particular arrangement of FIG. 2 low-frequency elements are placed along the left axis (4) while high-frequency elements are place along...

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Abstract

The present invention refers generally to a new family of antenna arrays that are able to operate simultaneously at two different frequency bands, while featuring dual-polarization at both bands. The design is suitable for applications where the two bands are centered at two frequencies f1 and f2 such that the ratio between the larger frequency (f2) to the smaller frequency (f1) is f2/f1<1.5. The dual-band dual-polarization feature is achieved mainly by means of the physical position of the antenna elements within the array. Also, some particular antenna elements are newly disclosed to enhance the antenna performance.

Description

DESCRIPTIONOBJECT OF THE INVENTION[0001] The present invention refers generally to a new family of antenna arrays that are able to operate simultaneously at two different frequency bands, while featuring dual-polarization at both bands. The design is suitable for applications where the two bands are centered at two frequencies f1 and f2 such that the ratio between the larger frequency (f2) to the smaller frequency (f1) is f2 / f1<1.5. The dual-band dual-polarization feature is achieved mainly by means of the physical position of the antenna elements within the array. Also, some particular antenna elements are newly disclosed to enhance the antenna performance.[0002] The development of dual-band dual-polarization arrays is of most interest in for instance cellular telecommunication services. Both second generation (2G) cellular services, such as the European GSM900, GSM1800 and the American AMPS and PCS1900, and third generation (3G) cellular services (such as UMTS) take advantage o...

Claims

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Application Information

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IPC IPC(8): H01Q1/24H01Q1/38H01Q5/42H01Q21/00H01Q21/08H01Q21/24H01Q21/28
CPCH01Q1/246H01Q1/38H01Q5/42H01Q21/24H01Q21/28H01Q21/08
Inventor PUENTE BALIARDA, CARLESANGUERA PROS, JAIMEBORJA BORAU, CARMEN
Owner COMMSCOPE TECH LLC
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